Propiedades mécanicas y tribólogicas de recubrimientos alumina/titania proyectados por oxifuel (spray llama)

Abstract

In this paper the porosity, phases, mechanical properties and abrasive wear resistance of ceramic layers of A12O3/TiO2 deposited using the flame spray process are evaluated. The proportion of titania has a strong influence on the porosity of the coating, having observed an approximately linear plot decrease with the increasing of titania's content. Crystalline phases of the deposited layers changed according to the characteristics of the powder and the thermal process employed. It has been observed that hardness depends only on the titania percentage, also toughness decreases with coatings hardness but resistance to abrasive wear traces an increasing lineal plot with this property.